A pacemaker is a small device that’s placed in the chest or abdomen to help control abnormal heart rhythms. This device uses electrical pulses to prompt the heart to beat at a normal rate.
Pacemakers are used to treat arrhythmias (ah-RITH-me-ahs). Arrhythmias are problems with the rate or rhythm of the heartbeat. During an arrhythmia, the heart can beat too fast, too slow, or with an irregular rhythm. A heartbeat that’s too fast is called tachycardia (TAK-ih-KAR-de-ah). A heartbeat that’s too slow is called bradycardia (bray-de-KAR-de-ah).
During an arrhythmia, the heart may not be able to pump enough blood to the body. This may cause symptoms such as fatigue (tiredness), shortness of breath, or fainting. Severe arrhythmias can damage the body’s vital organs and may even cause loss of consciousness or death.
A pacemaker can relieve some arrhythmia symptoms, such as fatigue and fainting. A pacemaker also can help a person who has abnormal heart rhythms resume a more active lifestyle.
Your doctor will want to check your pacemaker regularly. Some pacemaker functions can be checked remotely through a telephone call or a computer connection to the Internet. Your doctor may ask you to come to his or her office to check your pacemaker.
Pacemaker batteries last between 5 and 15 years (average 6 to 7 years), depending on how active your pacemaker is. The wires of your pacemaker also may need to be replaced eventually. Your doctor can tell you whether your pacemaker or its wires need to be replaced.